98979 has 4 divisors (see below), whose sum is σ = 131976. Its totient is φ = 65984.

The previous prime is 98963. The next prime is 98981. The reversal of 98979 is 97989.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 98979 - 2⁴ = 98963 is a prime.

It is a D-number.

98979 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 98979.

It is not an unprimeable number, because it can be changed into a prime (98909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16494 + ... + 16499.

It is an arithmetic number, because the mean of its divisors is an integer number (32994).

2⁹⁸⁹⁷⁹ is an apocalyptic number.

98979 is a deficient number, since it is larger than the sum of its proper divisors (32997).

98979 is a wasteful number, since it uses less digits than its factorization.

98979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32996.

The product of its digits is 40824, while the sum is 42.

The square root of 98979 is about 314.6092814905. The cubic root of 98979 is about 46.2573789055.

Subtracting from 98979 its reverse (97989), we obtain a triangular number (990 = T₄₄).

The spelling of 98979 in words is "ninety-eight thousand, nine hundred seventy-nine".